.calculator-container {
  max-width: 400px;
  margin: 0 auto;
  padding: 20px;
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.calculator-title {
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 15px;
}

.form-label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

.form-input {
  width: 100%;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
}

.submit-button {
  width: 100%;
  padding: 10px;
  background-color: #4a90e2;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.submit-button:hover {
  background-color: #357abd;
}

.result-container {
  margin-top: 20px;
  padding: 15px;
  background-color: #e6f3ff;
  border-radius: 4px;
}

.error-message {
  margin-top: 20px;
  padding: 15px;
  background-color: #fff3cd;
  border-radius: 4px;
  color: #856404;
}